Variance partitioning of deconstructed tropical diatom communities in reservoirs cascade

We used variation partitioning to evaluate significance of local environment, spatial structure and hydrological connectivity in the diatom community variation in phytoplankton and superficial sediments of six reservoirs of southeast Brazil. Common and rare diatom species were represented by differe...

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Bibliographic Details
Published in:Aquatic sciences 2018-04, Vol.80 (2), p.1-11, Article 17
Main Authors: Marquardt, Gisele C., Padial, André Andrian, Bicudo, Carlos E. de M.
Format: Article
Language:English
Subjects:
Biomedical and Life Sciences
Diatoms
Dynamics
Ecological models
Ecology
Freshwater & Marine Ecology
Hydrologic models
Hydrology
Life Sciences
Marine & Freshwater Sciences
Oceanography
Organizations
Partitioning
Phytoplankton
Plankton
Rare species
Relative abundance
Research Article
Reservoirs
Rivers
Sediments
Species
Tropical climate
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Summary:We used variation partitioning to evaluate significance of local environment, spatial structure and hydrological connectivity in the diatom community variation in phytoplankton and superficial sediments of six reservoirs of southeast Brazil. Common and rare diatom species were represented by different data sets, according to the species relative abundance and frequency of occurrence. To clarify the connectivity effect on the metacommunity organization, analyses were performed with and without a hydrological connectivity matrix as predictor. Results for rare and common species were similar, but explanation power depended on the habitat and the climatic season. The hydrological connectivity predictor proved to play an important role toward explaining the diatom metacommunity dynamics. Consequently, this landscape feature should not be neglected in ecological models of managed rivers.
ISSN:1015-1621
1420-9055
DOI:10.1007/s00027-018-0571-6